In this July 16, 2013 aerial file photo, the downtown of the city of Detroit is shown. Detroit Emergency Manager Kevyn Orr raised more than a few eyebrows a year ago when he took the city into bankruptcy and predicted it would be out by the time his term expired in fall 2014. Because it is by far the largest city to file for municipal bankruptcy and the issues were so complex many experts predicted it would take years to resolve. But the city will take a major step toward that goal with a trial in federal bankruptcy court that starts Tuesday, Sept 2, 2014. (AP Photo/Paul Sancya, File)

In this July 16, 2013 aerial file photo, the downtown of the city of Detroit is shown. Detroit Emergency Manager Kevyn Orr raised more than a few eyebrows a year ago when he took the city into bankruptcy and predicted it would be out by the time his term expired in fall 2014. Because it is by far the largest city to file for municipal bankruptcy and the issues were so complex many experts predicted it would take years to resolve. But the city will take a major step toward that goal with a trial in federal bankruptcy court that starts Tuesday, Sept 2, 2014. (AP Photo/Paul Sancya, File)

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DETROIT (AP) â€” Lawyers for Detroit will attempt to convince a federal judge at the city’s bankruptcy trial that its plans to wipe out billions of dollars in debt should be approved.

After some delays, the start of the trial Tuesday in U.S. District Court comes just over 13 months after Detroit became the largest U.S. city to file for bankruptcy.

Detroit expects to cut $12 billion in unsecured debt to about $5 billion, which is “more manageable,” according to Bill Nowling, a spokesman for emergency manager Kevyn Orr.

Most creditors, including more than 30,000 retirees and city employees, have endorsed the plan of adjustment put together by Orr and his restructuring team.

The plan includes commitments from the state, major corporations, foundations and others to donate more than $800 million over 20 years to soften cuts to city pensions. In return, pieces in the city-owned Detroit Institute of Arts would be placed into a trust to keep them from being sold to satisfy creditors.

General retirees would take a 4.5 percent pension cut and lose annual inflation adjustments. Retired police officers and firefighters would lose only a portion of their annual cost-of-living raise.

The strongest opposition to the plan has come from bond insurers like New York-based Syncora Guarantee. Syncora has said its claim is about $400 million and that Detroit has unfairly discriminated against financial creditors.

“It has been a very fast-track bankruptcy, which Syncora has no issue with,” company attorney James Sprayregen said. “Syncora’s issue is the lack of transparency of the process and the unfair treatment of its claims.”